Multiwalled carbon nanotubes grown over green iron nanocatalyst as electrode for hydrogen-producing electrochemical cell

Mishra, Shanu; Jaiswal, Somesh Sunil; Mishra, Ashish Kumar

doi:10.1007/s10854-021-06772-y

Cited by 1 publication

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“…44-1246), which was observed on the surface of the Bi 2 MoO 6 precatalyst under negative electrochemical potentials (Figure c). The broad peaks at around 25° and the sharp peak at 55° were attributed to the carbon substance. − In particular, the detection of Bi 2 O 2 CO 3 (JCPDF no. 41-1488) after a reaction time of 6 h at −1.0 V indicated anion exchange between CO 3 2– and MoO 4 2– during the reconstruction process.…”

Section: Results and Discussionmentioning

confidence: 98%

Anion-Mediated In Situ Reconstruction of the Bi₂MoO₆ Precatalyst for Enhanced Electrochemical CO₂ Reduction over a Wide Potential Window

Huang,

Han,

Tang

et al. 2023

ACS Appl. Mater. Interfaces

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Electrochemical CO 2 reduction reaction (eCO 2 RR) is a viable approach to achieve carbon neutrality. Bismuth-based electrocatalysts demonstrate exceptional selectivity in CO 2 -to-formate conversion, but their reconstruction mechanisms during the eCO 2 RR remain elusive. Herein, the reconstruction processes of bismuth molybdate (Bi 2 MoO 6 ) nanoplates are elucidated during the eCO 2 RR. Operando and ex situ measurements reveal the in situ partial reduction of Bi 2 MoO 6 to Bi metal, forming Bi@Bi 2 MoO 6 at negative potentials. Meanwhile, CO 3 2− ions in the electrolyte spontaneously exchange with MoO 4 2− in Bi 2 MoO 6 . The obtained Bi@Bi 2 MoO 6 /Bi 2 O 2 CO 3 delivers a formate Faradaic efficiency (FE) of 95.2% at −1.0 V. Notably, high formate FEs (>90%) are maintained within a wide 500 mV window. Although computational calculations indicate a higher energy barrier for *OCHO formation on Bi 2 O 2 CO 3 , the prevention of excessive reduction to metal Bi significantly enhances long-term stability. Furthermore, the CO 3 2− ion exchange process occurs in various 2D Bi-containing precatalysts, which should be emphasized in further studies.

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Section: Results and Discussionmentioning

confidence: 98%

Anion-Mediated In Situ Reconstruction of the Bi₂MoO₆ Precatalyst for Enhanced Electrochemical CO₂ Reduction over a Wide Potential Window

Huang,

Han,

Tang

et al. 2023

ACS Appl. Mater. Interfaces

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Multiwalled carbon nanotubes grown over green iron nanocatalyst as electrode for hydrogen-producing electrochemical cell

Cited by 1 publication

References 40 publications

Anion-Mediated In Situ Reconstruction of the Bi₂MoO₆ Precatalyst for Enhanced Electrochemical CO₂ Reduction over a Wide Potential Window

Anion-Mediated In Situ Reconstruction of the Bi₂MoO₆ Precatalyst for Enhanced Electrochemical CO₂ Reduction over a Wide Potential Window

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Multiwalled carbon nanotubes grown over green iron nanocatalyst as electrode for hydrogen-producing electrochemical cell

Cited by 1 publication

References 40 publications

Anion-Mediated In Situ Reconstruction of the Bi2MoO6 Precatalyst for Enhanced Electrochemical CO2 Reduction over a Wide Potential Window

Anion-Mediated In Situ Reconstruction of the Bi2MoO6 Precatalyst for Enhanced Electrochemical CO2 Reduction over a Wide Potential Window

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Anion-Mediated In Situ Reconstruction of the Bi₂MoO₆ Precatalyst for Enhanced Electrochemical CO₂ Reduction over a Wide Potential Window

Anion-Mediated In Situ Reconstruction of the Bi₂MoO₆ Precatalyst for Enhanced Electrochemical CO₂ Reduction over a Wide Potential Window